AMSTRAD TS80 Manual de usuario

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Stas

vo

canst

nan

BIBL

SSSR

oe

5

i

‘

TS80

/

TS88

REMOTE

CONTROL

TOWER

SYSTEM

SERVICE

MANUAL

fee

Price:

£3.50

CONTENTS

|

General

Routine

Maintenance

Trouble

Shooting

Guide

Safety

Test

Procedure

Alignment

Instructions

Cabinet

Drawing

and

Parts

List

Dial

Cord

Stringing

Cassette

Mechanism

and

Parts

List

Cassette

Deck

Alignment

and

Maintenance

Record

Deck

Drawing

Record

Deck

Parts

List

Chassis

Drawing

Chassis

Parts

List

Main

PCB

~TS80

PCB’s

2-5

TS88

PCB’s

2-5

TS88

Tape

11

PCB

10

TS80

VU

Meter

PCB

Electrical

Parts

List

IC

Pin

Voltages

TS80

Circuit

Diagram

TS88

Circuit

Diagram

.

OONN

DAA

—_

©

11

Middle

Spread

21

22

&

23

24

Inside

Back

Cover

Back

Cover

GENERAL

ROUTINE

MAINTENANCE

-

-AMPLIFIER

SECTION

Power

Output

Frequency

Response

Distortion

Graphic

Equaliser

Filters

Signal

to

noise

ratio

TUNER

SECTION

FM

Section

MW

Section

LW

Section

FM

Sensitivity

FM

Aerial

Input

CASSETTE

SECTION

Tape

Tape

Speed

Tracks

Wow

and

Flutter

Distortion

Frequency

Response

Noise

Reduction

Microphone

Sensitivity

TURNTABLE

Cartridge

Transmission

Speed

Control

REMOTE

CONTROL

UNIT

Method

of

Transmission

Volume

up/down

Balance

left/right

Bass

up/down

Treble

up/down

Batteries

DIMENSIONS

AND

WEIGHTS

Main

Unit

Weight

Speakers

Weight

Mains

Voltage

The

following

cleaning

and

maintenance

should

be

carried

out

on

a

regular

basis:

1)

Always

ensure

that

the

stylus

is

clean

and

properly

located

in

the

cartridge.

8

Watts

RMS

per

channel

into

4

ohms

32

watis

Total

Peak

Music

Power

30Hz

—

20KH2

1%

@

1KHz

Full

Power

0.2%

@

1KHz

half

Power

50Hz2

+12dB

150Hz

+.12dB

400Hz

+

12dB

KHz

+

12cB

2.5KHz

+12dB

5KHz

+

12dB

15KHz

+.12dB

Scratch

—10dB

@

12KHz

Rumble

—10d8

@

40Hz

Loudness

+10dB

@

100Hz

at

max.

vol.

+6dB

@

10KHz

—30dB

Better

than

55dB

86.5-—

109MHz

525

~—

1650KHz

140

—

280KHz

5uV

75ohms

Cassette

Type

4.75cm

per

second

2

Track

Stereo

0.15%

WRMS

1%

@

1KHz

80Hz

—6KHz

Standard

Tape

60Hz

—

8KHz

Chrome

Tape

60H2—

10KHz

Metal

Tape

—10dB

@

10KHz

0.5mV

—

6000nm

BSR

P267

SC12M

Bett

Drive

Electronic

infra

Red-Pulse

Position

Modulation

(PPM)

OdB

max

—80dB

min

—25dB

attenuation

per

channel

+.10dB

@

100Hz

+10dB

@

10KHz

2x

1.5V

Leak

Proof

Type:

Hitachi

Maxell

200.

Ever

Ready

R6PP

or

equivalent

86cm

(h)

x

42cm

(w)

x

37cm

(a)

29.0Kg

49cm

(h)

x

27cm

{w)

x

13cm

(d)

4kg

each

220—

240V

AC

50Hz

2)

Werétommend

regular

cleaning

of

the

heads

and

the

pinch

roller

of

the

cassette

deck

and

there

are

two

ways

of

cleaning

these

parts:

tl.

using

a

cotton

bud

and

methylated

spirits.

To

clean

the

relevant

paris,

you

should

press

the

‘eject’

button

so

that

the

door

is

open.

Ensure

that

the

power

is

switched

off,

then

press

the

‘play’

key,

which

will

raise

both

heads

and

the

pinch

roller

which

can

then

be

cleaned

with

the

cotten

bud

and

methylated

spirits.

ie

using

a

commercial

‘head

cleaning’

cassette

as

per

the

manufacturers

instructions.

When

carrying

out

this

operation,

please

be

careful

not

to

exert

tco

much

force

on

the

cassette

door

as

this

may

cause

damage.

Whilst

it

is

appreciated

that

using

a

head

cleaning

cassette

is

a

more

convenient

methad,

this

does

tend

to

have

a

some-

what

abrasive

action

and

may

increase

the

wear

of

the

heads.

The

cassette

parts

should

be

cleaned

after

approximately

25

hours

use.

However,

it

may

be

necessary

to

clean

the

cassette

mechanism

at

specific

instances

as

some

cassettes

themselves

have

a

deposit

of

oxide

dust

which

may

be

deposited

on

the

relevant

parts.

SAFETY

TEST

continued

electrical

safety.

APT

ARRANGE

PLEASE

NOTE:

When

any

work

is

compieted

on

this

unit,

correct

safety

tests

must

be

carried

out

to

ensure

PLEASE

NOTE:

All

parts

shown

with

the

part

number

prefix

‘S’

are

Safety

Items

and

must

be

replaced

with

similar

items

having

an

identical

safety

specification.

All

of

these

items

may

be

purchased

direct

from

AMSTRAD

COMSUMER

ELECTRONICS

PLC

A

A

RSA

SN

OA:

RM

EE

RET

SARTRE

TE,

PER

IPE

MR

Ee

Rte

TY

AU

AY

FER

aS

SE

ARTO

COR

TEERES

-

GENERAL

TROUBLE

SHOOTING

GUIDE

All

functions

on

unit

fail

to

operate.

Lack

of

power

supply.

Check

mains

plug/mains

fuse.

All

functions

fail

to

operate

except

Fuse

F501

blown.

Replace.

|

record

deck

mechanism.

{f

fuse

continues

to

blow,

check

for

Check

and

replace

as

necessary.

faulty

mains

transformer

or

meter

bulbs.

If

fuse

still

continues

to

blow.

Circuit

fault

somewhere

in

area

of

power

supply.

Check

and

replace

as

necessary.

Replace

as

necessary.

Check

Bridge

Rectifier

or

Power

IC.

General

circuit

fault.

Check

and

repair

as

necessary.

Re-locate.

Fuses

502

or

503

blown.

If

either

fuse

continues

to

blow.

If

fuse

stili

continues

to

blow.

All

functions

fail

to

operate

except

record

deck

mechanism

Connecting

plug

between

cassette

section

and

main

amplifier

not

locating

properly.

Aerial

not

connected

or

aerial

faulty.

VU

LEDs

not

working.

Check

aerial

and

replace

or

repair

as

necessary.

General

circuit

fault

in

FM

stage.

Check

and

repair

as

necessary.

Repair/replace

as

necessary.

General

FM

circuit

fault.

Check

and

repair

as

necessary.

Re-align

decoder

(see

alignment

instructions).

Replace.

FM

Tuner

section

selects

no

station

but

gives

loud

hiss.

If

there

is

no

fault

in

the

aerial.

Poor

aerial:

750hm

downlead

broken.

lf

aerial

and

leads

are

ok.

FM

Tuner

gives

some

sound

but

poor

quality.

FM

works,

but

stereo

light

in-

Decoder

incorrectly

aligned.

operative.

LED

faulty.

Check

decoder

IC

UPC1197C.

lf

UPC1197C

ok,

fault

is

probably

C203

(470pf

Poly).

incorrect

alignment.

If

alignment

correct.

Check

and

replace

as

necessary.

Check

and

replace

as

necessary.

Check

and

re-align

as

necessary.

Circuit

fault.

Repair

as

necessary.

N.B.

If

replacing

any

components

on

the

AM

section,

the

set

must

be

re-aligned.

Repair

as

necessary.

AM

radio

section

(MW/LW)

inoperative

or

very

weak.

Wire

disconnected

from

power

supply.

Motor

fault.

Belt

disconnected.

Stylus

damaged.

Stylus

not

located

correctly

in

cartridge.

Cartridge

faulty.

Replace.

Cartridge

faulty.

Replace.

Wiring

between

cartridge

and

amplifier

section

disconnected.

Belt

slipping

or

stretched.

Record

deck

fails

to

operate

mechanically.

Repair/replace

as

necessary.

Replace.

Re-locate.

Record

deck

operates

mechanically

but

gives

weak

or

distorted

sound

on

both

channels.

Record

Deck

operates

mechanically

but

gives

no

sound

on

either

or

one

channel.

Clean,

relocate

or

replace

as

necessary.

Record

deck

wow

or

flutter.

Check

and

replace

as

necessary.

Record

deck

speed

control

Speed

control

IC

faulty.

inoperative.

|

Symptoms

|

Fault

|

Cure

Connecting

plug

between

cassette

section

and

main

amplifier

not

locating.

Motor

faulty.

Drive

belt

not

tn

position.

Cassette

deck

mechanism

not

turning.

Cassette

jammed.

General

mechanical

fault

in

cassette

mechanism.

Cassette

speed

varies

(wow

and

flutter)

Drive

belt

in

incorrect

position.

Motor

faulty.

General:

mechanical

fault

in

cassette

mechanism.

Dirty

or

worn

pinch

roller

assembly.

Dirty

R/P

Head.

R/P

Head

picks

up

dust

deposit

almost

constantly.

R/P

Head

worn.

Poor

quality

of

recording

or

playback.

Pinon

connecting

plug

between

cassette

circuit

and

amplifier

circuit

not

locating

properly.

Generali

electronic

fault

on

Cassette

Faulty

erase

head.

Wire

disconnected

from

erase

head.

Faulty

oscillator

coil

(L303).

When

making

new

recordings,

old

recordings

not

erasing

properly.

Re-locate.

Check

and

replace

as

necessary.

Re-position

drive

belt.

Check

for

stretching

of

the

belt

and

replace

if

necessary.

Replace

cassette.

Check

and

repair

as

necessary

.

Clean

or

replace

as

necessary.

Re-position

drive

belt

or

replace

if

worn

or

stretched.

Check

and

replace

as

necessary.

Check

and

repair

as

necessary.

Clean

as

necessary.

Head

requires

demagnetisation.

Replace.

N.B.

Please

refer

to

cassette

re-alignment

instructions.

Re-locate

plug

correctly.

Check

and

repair

as

necessary.

Replace.

Repair

as

necessary.

Check

and

replace

as

necessary.

Faulty

leads

from

main

amplifier

and

cassette.

LEDs

faulty.

VU

LEDs

not

working

correctly.-

Check

and

repair

as

necessary.

Replace

and

re-adjust.

Severe

hum

on

one

or

both

channels

with

volume

at

minimum.

Output

IC

faulty.

Check

and

replace.

Hum

on

one

or

both

channels

at

General

circuit

fault.

high

volume

only.

Check

and

repair

as

necessary.

Check

speaker

and

speaker

leads

by

reversal.

Output

IC

faulty.

One

channel

not

working.

One

channel

not

working

and

blows

fuse(s)

502

or

503.

Volume

or

tone

controls

crackling

when

operated.

Output

LEDs

not

working

correctly.

Faulty

LEDs.

Fault

on

LED

PCB.

Headphone

socket

faulty.

Lead

disconnected

between

‘phone

socket

and

speaker

socket.

Speaker

socket

faulty.

Faulty

speaker.

Check

by

reversal

of

speakers.

If

reversal

of

speakers

demonstrates

fault

in

amplifier

section,

faulty

power

IC.

If

fault

condition

persists,

general

amplifier

fault.

Sound

through

headphones

but

not

speakers,

one

or

both

channels.

One

speaker

gives

distorted

sound.

Repair

or

replace

as

necessary.

|

Check

and

replace

as

necessary.

ee

Dirty

or

worn

potentiometers.

Spray

with

switchclean

or

replace

|

if

necessary.

Replace

as

necessary.

Check

and

repair

as

necessary.

Check

and

replace.

Check

and

repair

as

necessary.

Check

and

replace

as

necessary.

Repair

and

replace

as

necessary.

Check

and

replace.

Check

and

repair

as

necessary.

SAFETY

TEST

PROCEDURE

These

tests

should

be

applied

to

the

set

after

any

work

is

carried

out.

These

tests

must

be

done

to

the

set

before

the

six

screw

blanking

plates

are

fitted

to

the

cabinet.

REQUIRED

TEST

EQUIPMENT

1.

Flash

Test

Generator

capable

of

testing

at

2.2kV

AC.

2.

Megger

tester

rated

at

500V

DC.

3.

Instrument

capable

of

testing

resistance

down

to

0.10hm

at

10amps.

TEST

PROCEDURE

1,

Stand

on

bench

clear

of

all

metal

objects.

No

leads

should

be

connected

to

the

unit.

Ensure

that

the

on/off

switch

is

in

the

ON

position.

2.

Set

Flash

test

generator

to

2.2kV

AC.

Connect

1

pole

to

the

live

and

neutral

mains

lead

connected

together

and

flash

test

the

following

points:

a)

The

headphone

socket

ring.

b)

The

rings

of

both

microphone

sockets.

C)

The

record

deck

transit

screw.

d)

All

control

Knobs

and

buttons.

e)

The

underneath

of

the

front

panel,

below

the

RECORD

LEVEL

knob.

f)

The

back

panel.

a:

Connect

the

megger

tester

to

the

live

and

neutral

mains

lead

connected

together

and

megger

test

the

following

points:

a)

The

headphone

socket

ring.

b)

The

rings

of

both

microphone

sockets.

Cc)

The

record

deck

transit

screw.

d)

All

control

Knobs

and

buttons.

e)

The

underneath

of

the

front

panel,

below

the

RECORD

LEVEL

knob.

f)

The

back

panel.

4.

Check

that

the

earth

lead

continuity

is

below

0.5

ohms

at

10amps

between

the

mains

earth

lead

core

and

the

record

deck

transit

screw.

CAUTION:

High

voltages

may

be

present

on

a

faulty

set

and

care

should

be

taken

to

avoid

electric

shocks.

Certain

components

within

this

set

are

specific

safety

items

and

must

be

replaced

with

similar

items

which

comply

to

the

same

safety

specification.

All

such

parts

may

be

obtained

direct

from

AMSTRAD

CONSUMER

ELECRONICS

PLC

ALIGNMENT

INSTRUCTIONS

Equipment

required:

VTVM;

AM/FM

Band

SSG;

Loop

Antenna;

AM/FM

IF

Genoscope;

Non

Metalic

Trimming

Tool;

Dummy

Load

—

470K;

Oscilloscope.

AM

Alignment

Step

FUNCTION

SIGNAL

IN

SIGNAL

OUT

METHOD

REMARKS

1.

AM

IF

Alignment

at

Inject

signal

at

TP1

from

AM

IF

Connect

G’scope

at

TP4.

Adjust

IFT

103

and

IFT

104

to

get

1.

Ensure

set

switched

to

MW

band.

-

468KHz.

SG.

Select

468KHz

AS

IF.

max

signal

output

on

‘scope.

2.

Vol

control

max.

Tone

controlat

centre.

3.

Sig.

input

optimumto

avoid

AGC

action.

REPEAT

STEP

1

UNTIL

NO

FURTHER

IMPROVEMENT

IS

OBSERVED.

Connect

loop

antenna

to

the

Connect

VTVM

and

O’scope

|

Adjust

T101

to

obtain

max

sig.

output

ferrite

rod.

Inject

signal

from

across

speaker

output

via

on

the

meter

and

‘scope.

AM

SSG

at

525KHz.

470K

dummy

load.

Connect

loop

ant.

to

the

ferrite

Connect

VTVM

and

O’scope

rod.

[nject

sig

from

AM

SSG

at

across

speaker

output

via

1650KHz.

470K

dummy

load.

REPEAT

STEPS

3

&

4

UNTIL

NO

FURTHER

IMPROVEMENT

OBTAINED

Connect

loop

ant.

to

the

ferrite

Connect

VTVM

and

O'scope___—i[

Adjust

L104

to

obtain

max

sig.

output

rod

to

inject

sig

from

AM

SSG

at

|

across

speaker

output

via

on

the

meter

and

scope.

470K

dummy

load.

Connect

VTVM

and

O'’scope__|

Adjust

TC

103

to

obtain

max

sig

output

on

the

meter

&

scope.

600KHz.

Connect

loop

ant.

on

the

ferrite

rod

to

inject

sig

from

AM

SSG

at

|

across

speaker

output

via

1400KHz.

470K

dummy

load.

REPEAT

STEPS

6

&

7

UNTIL

NO

FURTHER

IMPROVEMENT

Connect

VTVM

and

O’scope__'|

Adjust

T102

and

L104

to

obtain

max

across

speaker

output

via

sig

output

on

the

meter

and

scope.

470K

dummy

load.

MW

Osc.

Alignment

at

1650KHz.

MW

aerial

alignment

at

600KHz.

7.

MW

aerial

alignment

at

1400KHz.

1.

Ensure

set

tuned

to

525KHz.

2.

Vol

control

max.

Tone

control

at

centfe.

3.

Sig.

input

optimumto

avoid

AGC

action.

1.

Ensure

set

tuned

to

1650KHz.

2.

Vol

control

max.

Tone

control

at

centre.

3.

Sig.

input

optimumto

avoid

AGC

action.

MW

Osc.

Alignment

at

525KHz.

Adjust

TC

105

to

obtain

max

sig

output

on

the

metez.

1.

Ensure

set

tuned

to

6O0KHz.

2.

Vol

control

max.

Tone

control

at

centre.

3.

Sig.

input

optimumto

avoid

AGC

action.

1.

Ensure

set

tuned

to

1400KHz.

2.

Vol

control

max.

Tone

control

at

centre.

3.

Sig.

input

optimumto

avoid

AGC

action.

1.

Ensure

set

switched

to

LW.

2.

Set

tuned

to

14QKHz

3.

Vol

contro!

max.

Tone

control

at

centre.

4.

Sig.

input

optimumto

avoid

AGC

action.

1.

Ensure

set

switched

to

LW.

2.

Vol

control

max.

Tone

control

at

centre.

3.

Sig.

input

optimumto

avoid

AGC

action.

MW

&

LW

alignment

now

complete.

Ensure

all

the

coils

and

transformers

are

sealed.

1.

Ensure

set

switched

to

FM.

2.

Ensure

stereo/mono

sw

switched

to

mono.

3.

Sig.

input

optimumto

avoid

AGC

action.

1.

Ensure

set

switched

to

FM.

2.

Ensure

stereo/mono

sw

switched

to

mono.

3.

Sig.

input

optimumto

avoid

AGC

action.

Connect

loop

ant

to

ferrite

rod.

Inject

140KHz

from

AM

SSG.

LW

Osc

and

aerial

alignment

at

140KHz.

Connect

loop

anit

to

ferrite

rod.

Connect

VIVM

and

O'scope

{Adjust

TC

106

and

TC

104

to

obtain

Inject

280KHz

from

AM

SSG.

across

speaker

output

via

max

sig

output

on

the

meter

and

470K

dummy

load.

scope.

REPEAT

STEPS

9

&

10

UNTIL

NO

FURTHER

IMPROVEMENT

LW

Osc

alignment

at

280KHz.

FM

ALIGNMENT

FM

IF

alignment

at

10.7

MHz.

Adjust

T101

to

obtain

max

output

on

the

scope

with

a

symmetrical

‘S’

curve

centered

at

10.7MHz.

Connect

O’scope

to

TP5.

Inject

10.7MHz

signal

from

FM

IF

SSG

at

TP2.

Adjust

T102

to

obtain

symmetrical

‘S’

curve.

Inject

10.7MHz

signa!

from

Connect

O’scope

to

TPS.

FM

IF

SSG

at

TP2.

FM

IF

alignment

at

10.7MHz.

REPEAT

STEPS

1

&

2

UNTIL

NO

FURTHER

IMPROVEMENT

Inject

86.5MHz

signal

from

Connect

scope

&

VTVM

Adjust

L103

to

obtain

max

output

on

FM

IF

SSG

at

J101.

across

dummy

load.

the

meter.

1.

Ensure

set

tuned

to

86.5MHz.

2.

Ensure

stereo/mono

sw

switched

to

mono.

3.

Sig.

input

optimum

to

avoid

AGC

action.

1.

Ensure

set

tuned

to

109.5MHz.

2.

Ensure

stereo/mono

sw

switched

to

mono.

3.

Sig.

input

optimum

to

avoid

AGC

action.

FM

Osc

alignment

at

86.5MHz.

Adjust

TC2

to

obtain

max

output

on

the

meter.

Connect

scope

&

VTVM

across

dummy

load.

FM

Osc

alignment

at

109.5MHz.

FM

Osc

tracking

at

90MHz.

FM

Osc

tracking

at

‘Inject

106MHz

signal

from

Connect

scope

&

VIVM

106MHz.

FM

IF

SSG

at

J101.

across

dummy

load.

Inject

109.5MHz

signal

from

FM

IF

SSG

at

J101.

REPEAT

STEPS

4

&

5

UNTIL

NO

FURTHER

IMPROVEMENT

Inject

SOMHz

signal

from

Connect

scope

&

VTVM

Adjust

L102

to

obtain

max

output

on

FM

IF

SSG

at

J101.

across

dummy

load.

the

meter.

Ensure

set

tuned

to

930MHz,

vol

max,

tone

control

to

centre

sig

input

optimum

to

avoid

AGC

action.

Ensure

set

tuned

to

106MHz,

vol

max,

tone

control

to

centre

sig

input

optimum

to

avoid

AGC

action.

REPEAT

STEPS

7

&

8

UNTIL

NO

FURTHER

IMPROVEMENT

We

aD

Set

tuned

to

a

strong

stereo

Monitor

stereo

beacon.

Adjust

VR201

to

get

the

st.

1.

Ensure

set

switched

to

FM.

station.

beacon

on.

2.

Ensure

stereo/mono

sw

to

stereo.

©

Adjust

TC1

to

obtain

max

output

on

the

meter.

FM

MXP

adjustment.

FM

alignment

now

complete.

2]

<

3

ONODARWODN

—

Description

Dust

Cover

B8308

BSR

P267

Turntable

|

S/83007

Hinge

Cover

Cabinet

Castor

Receptacle

Castor

Screw

Cover

Magnet

Glass

Door

Handle

Pack

Handle

Hinge

Grommet

Hinge

Screw

Hinge

Top

Hinge

Pack

Hinge

Bottom

Cartridge

BSR

or

Cartridge

TETRAD

Stylus

BSR

Stylus

TETRAD

B9109

B3041

B9003A

B9003B

B1043

B9005

B8310

BS006A

B9006B

B9110A

B9110B

B9110

B9110C

B9111

83002A

83007A

83002B

83007B

CABINET

DRAWING

&

PARTS

LIST

|

Le

A)

INIMUM

_

v

FREQUENCY

DIAL

CORD

STRINGING

ARGE

16/2

TURNS

MALL:

RN

cé

Kos

°Y

START:

Y4

TURNS

|

No.

OONOOaRND

—

Description

Motor

Assy

R.W.

Idler

Arm

Assy

Idier

Arm

Assy

Belt

Main

Flywheel

Leaf

Switch

Record

Safety

Lever

Take

Up

Spool

Assy

Rewind

Spool

Assy

Pinch

Roller

Spring

Pinch

Roller

Head

Erase

Head

R.P.B.

CASSETTE

MECHANISM

Part

No.

Description

809151

809152

809154

Idier

Spring

809155

Idler

F.F./R.W.

809156

Flywheel

Holder

809157

Pause

Lock

Lever

80S158

Spring

Locking

Plate

809159

Head

Base

809160

Auto

Stop

Arm

Assy

809161

Stopper,

Locking

Plate

809162

F.F.

Gear

700017

Locking

Plate

Poly

Washer

700016

809165

809166

809167

809168

809169

809170

809171

809172

809173

809174

809175

CASSETTE

ALIGNMENT

INSTRUCTIONS

Equipment

required:

Double

Beam

Oscilloscope;

Frequency

Counter;

RMS

Meter;

Non-Metallic

Trimming

Tool;

6.8KHz

Test

Tape;

1kHz

Test

Tape.

FUNCTION

SIGNAL

IN

SIGNAL

OUT

METHOD

REMARKS

1

Bias

frequency

Switch

SW

301

to

record.

Monitor

‘scope

or

freq.

Adjust

L303

to

give

625KHz.

Ensure

the

AFC

switch

is

off.

adjustment.

counter

from

junction

C328,

C331.

2

Bias

trap

adjustment.

Switch

SW

301

to

record.

RMS

Meter

across

Adjust

L301/302

to

get

the

same

Voltage

should

not

change

if

the

R301/302

in

turn.

voltage

at

R301

&

R302.

AFC

sw

is

on

or

off.

3

Bias

level

adjustment.

Switch

SW

301

to

record.

RMS

Meter

across

Adjust

VR

301/VR

302

to

Ensure

AFC

switchis

off.

R301/302

in

turn.

show

4.5mvV.

4

Head

azimuth

6.8KHz

Test

tape.

Double

beam

’scope

at

Ensure

set

switched

to

tape.

adjustment.

speaker

sockets.

5

Tape

speed

adjustment.

1KHz

Test

tape.

Frequency

counter

at

Ensure

set

switched

to

tape.

speaker

socket.

Adjust

azimuth

screw

for

max

amplitude

on

both

channels

ensuring

both

signals

in

phase.

Adjust

motor

with

non-metallic

trimming

tool

for

correct

frequency.

CASSETTE

DECK

MECHANISM

-

GENERAL

MAINTENANCE

Before

attempting

any

specific

fault-finding

on

the

cassette

mechanisms,

it

is

recommended

that

the

following

checks

and

maintenance

procedures

be

carried

out.

1.

R/P

HEAD

(Symbol

14)

Thoroughly

clean

the

head

and

examine

for

signs

of

wear;

replace

if

worn;

de-magnetise.

2.

PINCH-ROLLER

ASSEMBLY

(Symbol!

12)

Thoroughly

clean,

check

general

condition.

if

rubber

roller

is

in

any

way

distorted,

replace

the

assembly.

Check

the

tension

of

the

Pinch-Roller

Spring,

the

tension

should

be

40

to

60gm.

3.

MAIN

BELT

(Symbol

5)

Ensure

the

belt

is

correctly

located.

Check

that

it

is

not

stretched

or

worn

and

replace

if

necessary.

In

any

event,

remove

the

belt

and

clean

with

methylated

spirits.

4.

TAKE-UP

SPOOL

ASSEMBLY

(Symbol

9)

Check

the

tension

of

this

using

a

cassette

torque

meter.

The

correct

reading

should

be

40gm

per

cm.

A

reading

of

between

30

and

50gm

per

cm

may

be

regarded

as

within

tolerance.

Should

the

reading

fall

below

30gm

per

cm,

it

must

be

adjusted

to

give

the

correct

torque.

lf

it

cannot

be

adjusted

it

should

then

be

replaced.

5.

REWIND

IDLER

ASSEMBLY

(Symbol!

2)

Check

the

tension

with

the

cassette

torque

meter

using

the

rewind

function.

The

torque

should

be

100gm

per

cm

but

a

reading

of

between

80

and

110gm

per

cm

may

be

considered

within

tolerance.

If

the

torque

falls

below

80gm

per

cm,

it

should

be

adjusted

to

give

the

correct

reading.

If

it

will

not

adjust

sufficiently,

it

should

be

replaced.

6.

MOTOR

(Symbol!

1)

Ensure

that

the

motor

is

securely

mounted

and

that

the

motor

rubbers

are

in

good

condition.

7.

FLY-WHEEL

(Symbol

6)

Check

that

the

Fly-wheel

spindle

is

not

worn

or

bent

and

that

it

is

securely

seated

in

its

bearing.

8.

INTERNAL

MECHANISM

After

prolonged

use,

the

internal

mechanism

will

normally

contain

substantial

deposits

of

oxide

dust.

Ensure

that

these

are

thoroughly

cleaned.

There

are

no

places

on

either

mechanism

which

require

any

oil

or

grease

and

the

application

of

any

such

lubrication

is

likely

to

seriously

harm

the

internal

workings

of

the

mechanism.

10

Item

A102110

A117441

A117382

A106210

A114446

A114621

A104189

B117437

A114759

A102166

A106089

A106510

A102126

A102616

A116570

B116574

A106513

A102718

A114784

A114759

A106089

A106206

A106510

A117393

A106749

A111516

A104865

A105267

BSR

P267

RECORD

DECK

AND

PARTS

LIST

|

PartNo.

|

Description

Circlip

Turntable

Assembly

Motor

Mounting

Screw

(3

off)

Grommet

(3

off}

Drive

Belt

Thrust

Washer

Transit

Screw

Mainplate

Welding

&

Riveting

Assembly

Unit

Mounting

Spring

Retaining

Ctip

Spring

Cup

Screw

type

B

No.6

x

6.5

Rec.

Pan

Hd.

(2

off)

Solder

Tag

(2

off)

Phono

Socket

Drive

Sleeve

D.C.

Motor

Requirements

76mm

of

05

P.V.C.

Sleeving

Cable

Clamp

Screw

type

B.T.6-20

x

8

Rec.

Pan

Hd.

Unit

Mounting

Spring

(2

off)

Spring

Cup

(2

off)

Tag

Mounting

Strip

Screw

type

B

No.6

x

6.5

Rec.

Pan

Hd.

P.U.

Hinge

Retainer

4B.A.

Tag

Lockwasher

Molex

Plug

Insulating

Strip

Screw

type

B.T.4-24

x

8

Rec.

Pan

Hd.

(2

off}

A300126

A106512

A102166

A116564

A106089

A114759

A106512

B117369

A325010

A117464

A104189

A116565

A117461

A117376

A114155

A117378

B117375

B116562

A117439

A103373

117420

A105237

A105142

A103373

D117379

A117483

A117368

Description

On/Off

Speed

Control

Board

(B40)

Screw

type

B.T.4-24

x

16

Rec.

Pan

Hd.

Retaining

Clip

Detent

Spring

Spring

Cup

Spring

(Unit

Mounting)

Screw

type

B.T.4-24

x

16

Rec.

Pan

Hd.

L.E.D.

Mounting

Clip

L.E.D.

Requirements

Escutcheon

Printing

Transit

Screw

Knob

Spindle

Controt

Escutcheon

Printing

Pick-Up

Rest

Cue

Knob

Raising

Arm

Raising

Pad

Knob

P.U.

Lead

Assembly

Securing

Rubber

(2

off)

Pick-Up

Hinge

P.U.

Balance

Spring

Spring

Anchor

Securing

Rubber

Pick-Up

Arm

Screw

type

‘Plastite’

4-20

x

6.5

Rec.

Pan

Hd.

(Black)

Pivot

Pin